package StackAndQueue;

import java.util.Stack;

public class Test{
    public static void main(String[] args) {
        Stack<Integer> stack=new Stack<>();
        stack.push(1);
        stack.push(2);
        stack.push(3);
        stack.push(4);
        int ret=stack.pop();
        System.out.println(ret);

        int ret1=stack.peek();
        System.out.println(ret1);
    }
}

